Chapter 5 • Bandwidth management
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1037852-0001 Revision A
Figure 8 illustrates the CIR with best effort service. In this access
mode, the satellite router is provided the guaranteed CIR the
moment traffic activity is detected. A satellite router is eligible to
receive bandwidth in excess of its guaranteed CIR up to its
maximum CIR based upon its advertised backlog, periodic, and
left-over bandwidth. The DNCC (the bandwidth manager element
in the HX gateway) provides the requested (or excess) bandwidth
in a best effort manner. If the bandwidth is available, it is granted
up to the maximum rate defined for the satellite router.
Outroute CIR
Statically configured CIR service requirements (Hard QoS
configuration per VSAT):
• CIR traffic is assigned a lower priority than CBR traffic and a
higher priority than best effort traffic.
• The CIR configuration specifies a minimum CIR (minCIR)
and maximum CIR (maxCIR) bit rates on a per-remote basis.
• The IP gateway supports remotes with different outroute CIR
requirements.
• The CIR bit rates values range from 32 Kbps to the IP
gateway CIR.
• CIR users are not allowed to pass traffic in excess of maxCIR
bit rate.
• CIR users with a CIR level between the minCIR and the
maxCIR bit rate are serviced as best effort users, but the
traffic is sent at CIR users traffic priority.
Figure 8: CIR services with best effort
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